body{
    margin:0px;
    padding:20px;
    display: flex;
}

.comBox{
    padding: 20px;
    border: solid 1px;
    width: calc(25% - 15px);
    margin-right: 20px;
}

body .comBox:nth-child(4n+0){
    margin-right: 0px;
    background-color: crimson;
}

.comBox .title{
    font-size: 20px;
    line-height: 40px;
}

.comBox .optBox{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.comBox .optBox input{
    width: 100%;
    margin-bottom: 20px;
}

.comBox .optBox button{
    width: 60%;
}